.

[flightgear.git] / FDM / flight.c

diff --git a/FDM/flight.c b/FDM/flight.c
index 7290f2a7450ef445eb5938f38bd525e028ae84b3..abb1321a27f884e90bc4bde4e5fc2fb992b8d4bc 100644 (file)
--- a/FDM/flight.c
+++ b/FDM/flight.c
@@ -28,6 +28,8 @@
 #include <Debug/fg_debug.h>
 #include <Flight/flight.h>
 #include <Flight/LaRCsim/ls_interface.h>
+#include <Include/fg_constants.h>
+#include <Math/fg_geodesy.h>
 
 
 fgFLIGHT cur_flight_params;
@@ -35,17 +37,32 @@ fgFLIGHT cur_flight_params;
 
 /* Initialize the flight model parameters */
 int fgFlightModelInit(int model, fgFLIGHT *f, double dt) {
+    double save_alt = 0.0;
     int result;
 
     fgPrintf(FG_FLIGHT,FG_INFO,"Initializing flight model\n");
 
-    if ( model == FG_LARCSIM ) {
+    if ( model == FG_SLEW ) {
+       // fgSlewInit(dt);
+    } else if ( model == FG_LARCSIM ) {
+       /* lets try to avoid really screwing up the LaRCsim model */
+       if ( FG_Altitude < -9000 ) {
+           save_alt = FG_Altitude;
+           FG_Altitude = 0;
+       }
+
        fgFlight_2_LaRCsim(f);  /* translate FG to LaRCsim structure */
        fgLaRCsimInit(dt);
-       fgPrintf(FG_FLIGHT,FG_INFO,"FG pos = %.2f\n", FG_Latitude);
+       fgPrintf( FG_FLIGHT, FG_INFO, "FG pos = %.2f\n", FG_Latitude );
        fgLaRCsim_2_Flight(f);  /* translate LaRCsim back to FG structure */
+
+       /* but lets restore our original bogus altitude when we are done */
+       if ( save_alt < -9000 ) {
+           FG_Altitude = save_alt;
+       }
     } else {
-       fgPrintf(FG_FLIGHT,FG_WARN,"Unimplemented flight model == %d\n", model);
+       fgPrintf( FG_FLIGHT, FG_WARN,
+                 "Unimplemented flight model == %d\n", model );
     }
 
     result = 1;
@@ -58,10 +75,15 @@ int fgFlightModelInit(int model, fgFLIGHT *f, double dt) {
 int fgFlightModelUpdate(int model, fgFLIGHT *f, int multiloop) {
     int result;
 
-    if ( model == FG_LARCSIM ) {
+    // printf("Altitude = %.2f\n", FG_Altitude * 0.3048);
+
+    if ( model == FG_SLEW ) {
+       // fgSlewUpdate(f, multiloop);
+    } else if ( model == FG_LARCSIM ) {
        fgLaRCsimUpdate(f, multiloop);
     } else {
-       fgPrintf(FG_FLIGHT,FG_WARN,"Unimplemented flight model == %d\n", model);
+       fgPrintf( FG_FLIGHT, FG_WARN,
+                 "Unimplemented flight model == %d\n", model );
     }
 
     result = 1;
@@ -70,10 +92,46 @@ int fgFlightModelUpdate(int model, fgFLIGHT *f, int multiloop) {
 }
 
 
+/* Set the altitude (force) */
+int fgFlightModelSetAltitude(int model, fgFLIGHT *f, double alt_meters) {
+    double sea_level_radius_meters;
+    double lat_geoc;
+    // Set the FG variables first
+    fgGeodToGeoc( FG_Latitude, alt_meters, 
+                 &sea_level_radius_meters, &lat_geoc);
+
+    FG_Altitude = alt_meters * METER_TO_FEET;
+    FG_Radius_to_vehicle = FG_Altitude + 
+       (sea_level_radius_meters * METER_TO_FEET);
+
+    /* additional work needed for some flight models */
+    if ( model == FG_LARCSIM ) {
+       ls_ForceAltitude(FG_Altitude);
+    }
+
+}
+
+
 /* $Log$
-/* Revision 1.13  1998/04/25 22:06:28  curt
-/* Edited cvs log messages in source files ... bad bad bad!
+/* Revision 1.17  1998/08/24 20:09:07  curt
+/* .
 /*
+ * Revision 1.16  1998/08/22  14:49:55  curt
+ * Attempting to iron out seg faults and crashes.
+ * Did some shuffling to fix a initialization order problem between view
+ * position, scenery elevation.
+ *
+ * Revision 1.15  1998/07/30 23:44:36  curt
+ * Beginning to add support for multiple flight models.
+ *
+ * Revision 1.14  1998/07/12 03:08:27  curt
+ * Added fgFlightModelSetAltitude() to force the altitude to something
+ * other than the current altitude.  LaRCsim doesn't let you do this by just
+ * changing FG_Altitude.
+ *
+ * Revision 1.13  1998/04/25 22:06:28  curt
+ * Edited cvs log messages in source files ... bad bad bad!
+ *
  * Revision 1.12  1998/04/21 16:59:33  curt
  * Integrated autopilot.
  * Prepairing for C++ integration.